#include <protocol.h>
#include "string.h"
const unsigned short CRC_Table[256]=       //	CCITT	 	X16+X12+X5+1
{
    0x0000, 0x1021, 0x2042, 0x3063, 0x4084, 0x50A5, 0x60C6, 0x70E7,
    0x8108, 0x9129, 0xA14A, 0xB16B, 0xC18C, 0xD1AD, 0xE1CE, 0xF1EF,
    0x1231, 0x0210, 0x3273, 0x2252, 0x52B5, 0x4294, 0x72F7, 0x62D6,
    0x9339, 0x8318, 0xB37B, 0xA35A, 0xD3BD, 0xC39C, 0xF3FF, 0xE3DE,
    0x2462, 0x3443, 0x0420, 0x1401, 0x64E6, 0x74C7, 0x44A4, 0x5485,
    0xA56A, 0xB54B, 0x8528, 0x9509, 0xE5EE, 0xF5CF, 0xC5AC, 0xD58D,
    0x3653, 0x2672, 0x1611, 0x0630, 0x76D7, 0x66F6, 0x5695, 0x46B4,
    0xB75B, 0xA77A, 0x9719, 0x8738, 0xF7DF, 0xE7FE, 0xD79D, 0xC7BC,
    0x48C4, 0x58E5, 0x6886, 0x78A7, 0x0840, 0x1861, 0x2802, 0x3823,
    0xC9CC, 0xD9ED, 0xE98E, 0xF9AF, 0x8948, 0x9969, 0xA90A, 0xB92B,
    0x5AF5, 0x4AD4, 0x7AB7, 0x6A96, 0x1A71, 0x0A50, 0x3A33, 0x2A12,
    0xDBFD, 0xCBDC, 0xFBBF, 0xEB9E, 0x9B79, 0x8B58, 0xBB3B, 0xAB1A,
    0x6CA6, 0x7C87, 0x4CE4, 0x5CC5, 0x2C22, 0x3C03, 0x0C60, 0x1C41,
    0xEDAE, 0xFD8F, 0xCDEC, 0xDDCD, 0xAD2A, 0xBD0B, 0x8D68, 0x9D49,
    0x7E97, 0x6EB6, 0x5ED5, 0x4EF4, 0x3E13, 0x2E32, 0x1E51, 0x0E70,
    0xFF9F, 0xEFBE, 0xDFDD, 0xCFFC, 0xBF1B, 0xAF3A, 0x9F59, 0x8F78,
    0x9188, 0x81A9, 0xB1CA, 0xA1EB, 0xD10C, 0xC12D, 0xF14E, 0xE16F,
    0x1080, 0x00A1, 0x30C2, 0x20E3, 0x5004, 0x4025, 0x7046, 0x6067,
    0x83B9, 0x9398, 0xA3FB, 0xB3DA, 0xC33D, 0xD31C, 0xE37F, 0xF35E,
    0x02B1, 0x1290, 0x22F3, 0x32D2, 0x4235, 0x5214, 0x6277, 0x7256,
    0xB5EA, 0xA5CB, 0x95A8, 0x8589, 0xF56E, 0xE54F, 0xD52C, 0xC50D,
    0x34E2, 0x24C3, 0x14A0, 0x0481, 0x7466, 0x6447, 0x5424, 0x4405,
    0xA7DB, 0xB7FA, 0x8799, 0x97B8, 0xE75F, 0xF77E, 0xC71D, 0xD73C,
    0x26D3, 0x36F2, 0x0691, 0x16B0, 0x6657, 0x7676, 0x4615, 0x5634,
    0xD94C, 0xC96D, 0xF90E, 0xE92F, 0x99C8, 0x89E9, 0xB98A, 0xA9AB,
    0x5844, 0x4865, 0x7806, 0x6827, 0x18C0, 0x08E1, 0x3882, 0x28A3,
    0xCB7D, 0xDB5C, 0xEB3F, 0xFB1E, 0x8BF9, 0x9BD8, 0xABBB, 0xBB9A,
    0x4A75, 0x5A54, 0x6A37, 0x7A16, 0x0AF1, 0x1AD0, 0x2AB3, 0x3A92,
    0xFD2E, 0xED0F, 0xDD6C, 0xCD4D, 0xBDAA, 0xAD8B, 0x9DE8, 0x8DC9,
    0x7C26, 0x6C07, 0x5C64, 0x4C45, 0x3CA2, 0x2C83, 0x1CE0, 0x0CC1,
    0xEF1F, 0xFF3E, 0xCF5D, 0xDF7C, 0xAF9B, 0xBFBA, 0x8FD9, 0x9FF8,
    0x6E17, 0x7E36, 0x4E55, 0x5E74, 0x2E93, 0x3EB2, 0x0ED1, 0x1EF0
};


//addcrc(reply_temp,reply_len);
//reply_len=trans_7c_set(reply_temp,reply_len);
//send2sever(reply_temp,reply_len);


unsigned short crc_table(unsigned char *ptr,unsigned short len)
{
    unsigned char crcdata;
    unsigned short  CRC_data = 0;
    ptr++;
    len--;
    while(len!=0)
        {
            crcdata=(unsigned char) (CRC_data/256);
            CRC_data<<=8;
            CRC_data^=CRC_Table[crcdata^*ptr];
            ptr++;
            len--;
        }
    return(CRC_data);
}


void addcrc(unsigned char *ptr,unsigned short len)
{
    unsigned short crctmp;
    crctmp=crc_table(ptr,len-3);

    *(ptr+len-3)=crctmp&0xff;
    *(ptr+len-2)=(crctmp>>8)&0xff;
}


unsigned short trans_7c_set(unsigned char *p_ad,unsigned short lengh)
{
    unsigned short i,j,q;
    unsigned char ch;
    ch=*(p_ad+lengh-1);
    q=lengh-1;

    for(i=1; i<q; i++)
        {
            if(*(p_ad+i)==0x5c)
                {
                    for(j=q; j>i+1; j--)
                        {
                            *(p_ad+j)=*(p_ad+j-1);
                        }
                    *(p_ad+i+1)=0x5B;
                    q++;
                }
            else if(*(p_ad+i)==0x7c)
                {
                    for(j=q; j>i+1; j--)
                        {
                            *(p_ad+j)=*(p_ad+j-1);
                        }
                    *(p_ad+i)=0x5c;
                    *(p_ad+i+1)=0x7B;
                    q++;
                }
        }
    *(p_ad+q)=ch;//0x7c;
    q++;
    return q;
}


unsigned short trans_7c_clr(unsigned char *p_ad,unsigned short lengh)
{
    unsigned short i,j,q;
    q=lengh;
    for(i=1; i<q; i++)
        {
            if((*(p_ad+i)==0x5c)&&(*(p_ad+i+1)==0x5b))
                {
                    for(j=i+1; j<q-1; j++)
                        {
                            *(p_ad+j)=*(p_ad+j+1);
                        }
                    q--;
                }
            else if((*(p_ad+i)==0x5c)&&(*(p_ad+i+1)==0x7b))
                {
                    *(p_ad+i)=0x7c;
                    for(j=i+1; j<q-1; j++)
                        {
                            *(p_ad+j)=*(p_ad+j+1);
                        }
                    q--;
                }
        }
    return q;
}

unsigned char get_index()
{
    static int count=0;
    count++;
    if(count>255)
        count=0;
    return count;
}



void create_update_msg(unsigned char * reply_temp,int *len){


    reply_temp[0]=0x7c;

    reply_temp[3]=0x30;
    reply_temp[4]=0xff;

    reply_temp[5]=0;
    reply_temp[6]=1;
    reply_temp[7]=get_index();
    reply_temp[8]=0;

    reply_temp[9]=0;
    reply_temp[10]=0;
    reply_temp[11]=0;
    reply_temp[12]=0;
    reply_temp[23]=0x7c;
    *len=24;
    reply_temp[1]=*len;
    reply_temp[2]=*len>>8;
    addcrc(reply_temp,*len);
    *len=trans_7c_set(reply_temp,*len);
}


void creat_upgrade_msg(unsigned char* temdata,int* len,int pack_num,int current_pack_num,unsigned int version)
{
    unsigned char data[*len];
    memcpy(data,temdata,*len);
    memset(temdata,0,*len);

    temdata[0]=0x7c;
    temdata[1]=0;
    temdata[2]=0;
    temdata[3]=0x31;
    temdata[4]=0xff;
    temdata[5]=0;
    temdata[6]=1;
    temdata[7]=get_index();
    temdata[8]=0;

    temdata[9]=version;
    temdata[10]=version>>8;
    temdata[11]=version>>16;

    temdata[13]=pack_num;
    temdata[14]=pack_num>>8;
    temdata[15]=current_pack_num;
    temdata[16]=current_pack_num>>8;
    temdata[17]=*len;
    temdata[18]=(*len)>>8;
    memcpy(&temdata[19],data,*len);
    temdata[(*len)+19+2]=0x7c;

    unsigned int msg_len=*len+19+3;
    temdata[1]=msg_len;
    temdata[2]=msg_len>>8;
    addcrc(temdata,msg_len);
    *len=trans_7c_set(temdata,msg_len);
}
const static char lut[]={
    '0',
    '1',
    '2',
    '3',
    '4',
    '5',
    '6',
    '7',
    '8',
    '9',
    'A',
    'B',
    'C',
    'D',
    'E',
    'F'
};
char hexconvertostring(unsigned char val)
{
    return lut[val&0xf];
}

unsigned char checkcrc(unsigned char *ptr,unsigned short len)
{
    unsigned short crctmp;
    if(len<4)
    {
        return 0;
    }
    crctmp=crc_table(ptr,len-3);
    if((crctmp==((ptr[len-3]<<8)|ptr[len-2]))||(crctmp==((ptr[len-2]<<8)|ptr[len-3])))
        return 1;
    else
        return 0;
}


unsigned short receiveDataPakageProcess(unsigned char *p,unsigned short len)
{
    unsigned short clrLen = 0;
    unsigned char crcCheckStatus;

    clrLen = trans_7c_clr(p,len);

    crcCheckStatus = checkcrc(p,clrLen);
    if(crcCheckStatus == 1)
        {
            return clrLen;
        }
    else
        {
            return 0;
        }
}


